[Bug]: tree shaking breaks with require() in some situation

[Ayc0]

System Info

  System:
    OS: macOS 15.5
    CPU: (10) arm64 Apple M1 Max
    Memory: 2.34 GB / 64.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.4.1 - ~/.volta/tools/image/node/24.4.1/bin/node
    pnpm: 10.13.1 - ~/.volta/tools/image/pnpm/10.13.1/bin/pnpm
    Watchman: 2025.07.28.00 - /opt/homebrew/bin/watchman
  npmPackages:
    @rspack/core: ^1.4.10 => 1.4.10

Details

If you have a file foo.ts that contains 2 exports:

// foo.ts
exports.bar = 'bar';
exports.paz = 'paz';

Tree shaking will work (aka the unused variable will be stripped out during compilation) when writing:

// stripped.ts
import { bar } from './foo';
const bar = require('./foo').bar;

But in some other instances, paz is kept in the bundle:

// kept.ts
const { bar } = require('./foo');
const module = require('./foo'); // And then only `module.foo` is used

Reproduce link

https://github.com/Ayc0/code-splitting-issue

Reproduce Steps

You can clone https://github.com/Ayc0/code-splitting-issue and run node --test tests/rspack.test.mjs (requires node 24.4.0+)